Crank shaft bearing by itself is friendly to the wallet. Crankshaft bearing + if crank journal damaged + while u r at it stuff + overall labour is not that friendly to wallet.
This is how i gauge repair cost;
1.search for the parts price online inclusive of consumables related to it (gasket maker, seals, gasket, oil, fluid )
2.Add some to each parts cost. If minor parts i will add RM50 and below, if major parts will add up to RM200 to RM500 as most workshops will mark up.
3.Add few more hundred for labour.
I did this by comparing older repair bill esp the labor cost and always estimate higher. Easiest way is to ask a rough estimate from workshop. I did the estimation myself because i want to see if its worth it to DIY. If that time my pocket is deep, I will just send to shop and say the magic word 'buat lah, xpe buat pelan2 tak urgent. dah siap nanti call'.